additional sourceOkutani T., Tsuchida E. & Fujikura K. (1992). Five bathyal gastropods living within or near the Calyptogena-community of the Hatsushima islet, Sagami Bay. <em>Venus.</em> 51(3): 137-148., available online athttps://doi.org/10.18941/venusjjm.51.3_137 page(s): 145, figs 22-23 [details] Available for editors [request]